CN102601887A - Production equipment and method for long fiber reinforced thermoplastic - Google Patents
Production equipment and method for long fiber reinforced thermoplastic Download PDFInfo
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- CN102601887A CN102601887A CN2011100277203A CN201110027720A CN102601887A CN 102601887 A CN102601887 A CN 102601887A CN 2011100277203 A CN2011100277203 A CN 2011100277203A CN 201110027720 A CN201110027720 A CN 201110027720A CN 102601887 A CN102601887 A CN 102601887A
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Abstract
The invention discloses a dispersed structure during production of long fiber reinforced thermoplastic when grey yarns are impregnated, an impregnating mould head that uses the dispersed structure and a production method that uses the impregnating mould head. The dispersed structure provided by the invention is provided with a rotary dispersing core that is capable of dispersing the grey yarns effectively, has small abrasion and is not easy to break the mould head. The impregnating mould head that comprises a plurality of impregnating units and uses the structure is convenient to disassemble and has good universality and high efficiency. Compared with prior production method, the production method for long fiber reinforced thermoplastic that uses the impregnating mould head uses multiple strands and units to impregnate so that reinforced fiber is distributed uniformly in the bar (cross section) and ensures that fiber is not exposed so as to improve the production efficiency and quality. Meanwhile, as monofilament is not easy to break the mould head, the continuous production capacity of the production equipment is high.
Description
Technical field
The present invention relates to the production equipment and the production method of long fiber reinforced plastics; Be specifically related to a kind of impregnated structures that can fully the long fibre raw yarn be disperseed; Simultaneously also related to the dipping die head that adopts this structure, and the method for using the first-born product long fiber reinforced plastics of this dipping former.
Background technology
Long fibre reinforced thermoplastics (Long-Fiber Reinforce Thermoplastic); Being called for short LFT is a kind of characteristics such as designability, low-density, high specific strength, high ratio modulus and impact resistance are strong that have; The appearance of LFT thermoplastic has constituted huge challenge to aluminium alloy, fiber reinforcement same with thermosetting compound material, and the LFT thermoplastic also progressively becomes the main flow material of making auto parts and components.
In the process of producing LFT; Need be in extruder head the raw yarn of long fiber material (such as glass fibre, carbon fiber) being dispersed into monofilament can be fully to soaking into the plastics that make things convenient for fusion; So that the LTF material bar that finishes to be extruded the back at whole dipping process has good performance, often be dispersed into quality and performance that the monofilament degree has determined final LFT material bar.
Employed dipping die head in the technology of existing production LFT; Like disclosed technical scheme in the Chinese patent " a kind of forming method of continuous fiber reinforced thermoplastic resin and former thereof " (publication number CN101152767A); Adopt and arrange many group jockey pulleys, in drawing the process of yarn, (this is a term in this patent document to make raw yarn alternately pass the jockey pulley song successively; And it is irrelevant with our patent; Can not change?) line advances, raw yarn is constantly disperseed by jockey pulley, thereby its plastics that can be melted are soaked into.But this technical scheme plays monofilament easily and fractures under high speed traction situation, melt impregnation is caused destabilizing factor, and jockey pulley is not easy dismounting and safeguards simultaneously.
To above-mentioned situation; The problem that Chinese patent " long fiber reinforced plastics production is with fibre bundle fuse dipping die head and dipping method " (publication No. CN 101695873A) fractures for the monofilament that solves the technique scheme appearance; Its additional noncontact godet that is provided with; Raw yarn is passed from the noncontact godet, this kind technical scheme, it is limited that the monofilament problem that fractures is improved.
Above-mentioned two kinds of technical schemes all adopt the sub-thread raw yarn to get into impregnation chamber, utilize jockey pulley to disperse the long fibre raw yarn; Fortifying fibre reaches certain ratio in the thermoplastic material bar of extruding in order to make; General employing number is the raw yarn of big (number number is the tex value), and general number number scope is between 1200-2400tex; Probably contain 4000 to 5000 monofilament in the raw yarn; Reach good dispersion effect if desired, often need to be provided with in the long impregnation chamber many group jockey pulleys and carry out multistage dispersion, so operating efficiency has received considerable restraint.In addition; Because jockey pulley can only make raw yarn on the jockey pulley axial direction, disperse, and that is to say that the raw yarn through jockey pulley only scatters on a dimension, monofilament scatters limited; Effect of impregnation may is maximization not, and when carrying out extrusion molding, is difficult to them and is evenly distributed in the material space, bar cross section.
Summary of the invention
For solving the deficiency that prior art exists, the object of the present invention is to provide a kind of impregnated structures that can fully the long fibre raw yarn be disperseed, adopt the dipping die head of this structure and the method for using the first-born product long fiber reinforced plastics of this dipping former.
To achieve these goals, the present invention adopts following technical scheme:
Be applicable to the raw yarn dispersed structure of long fibre molten plastic dipping, it is characterized in that what comprise that axis is parallel to each other plurally advances the yarn through hole, above-mentioned advance the yarn through hole with its axially vertical cross section on distribute with the center symmetric mode; Comprise that also axis is through above-mentioned that advance yarn through hole symmetrical centre and advance the parallel collection yarn through hole of yarn through-bore axis with above-mentioned; Also comprise and to examine core with the diffusing yarn that contact through the above-mentioned raw yarn that advances yarn through hole and collection yarn through hole with concavo-convex profile; Yarn nuclear core that should loose is only to intersect at 2 straight line rotation with it in the same plane and the revolving body that forms by a plane curve; Above-mentioned curve is a smoothed curve, above-mentioned straight-line pass is above-mentioned advance the yarn through hole symmetrical centre and with the above-mentioned parallel axes of advancing the yarn through hole; Also comprise the recess that is arranged between two bossings of above-mentioned diffusing yarn nuclear wicking surface yarn guiding ring peripheral and that can examine core around whole diffusing yarn, above-mentioned yarn guiding ring is formed with the level and smooth guide contact-making surface to the diffusing yarn nuclear core protrusion that is positioned at its center.
The aforesaid raw yarn dispersed structure that is applicable to long fibre molten plastic dipping is characterized in that, the curve that forms above-mentioned diffusing yarn nuclear core is one or more the combination in parabola, circular arc, elliptic arc, sine curve, cosine curve, the straight line.
Utilize the dipping die head of aforesaid raw yarn dispersed structure; Comprise the dipping runner, it is characterized in that, also comprise the more than one impregnating unit that communicates with above-mentioned dipping runner; Above-mentioned impregnating unit comprises the impregnation chamber that two ends connect; End in above-mentioned impregnation chamber is provided with the extruding end skull that has extrusion cavities, the other end be provided with have above-mentioned advance yarn through hole and diffusing yarn nuclear core advance yarn termination lid, is provided with the collection yarn mouth mould that has above-mentioned Ji Shakou near above-mentioned extruding end skull one side in the above-mentioned impregnation chamber; The axis of above-mentioned extrusion cavities and collection yarn through hole point-blank.
Aforesaid dipping die head is characterized in that, is provided with the yarn guiding ring assembly that is fixed on above-mentioned impregnation chamber one end in the above-mentioned impregnation chamber, and above-mentioned yarn guiding ring assembly is provided with above-mentioned yarn guiding ring or yarn guiding ring components body forms above-mentioned yarn guiding ring.
Aforesaid dipping die head is characterized in that, the outer wall of the inwall of above-mentioned extruding end skull and collection yarn mouth mould is formed with the extrusion channel of gradually closing.
Aforesaid dipping die head is characterized in that, the number of above-mentioned impregnating unit is 1 to 60, and the number that advances the yarn through hole that above-mentioned each impregnating unit is provided with is 2 to 30.
Utilize the method for the first-born product long fibre of aforesaid dipping former reinforced thermoplastics, it is characterized in that, comprise the steps:
A, according to the number of impregnating unit in the above-mentioned dipping die head and the number of each impregnating unit yarn inlet, fortifying fibre raw yarn yarn tube is placed on respectively on the corresponding creel;
B, the raw yarn of drawing from fortifying fibre raw yarn yarn tube carry out pre-dispersed through the jockey pulley together;
C, the fortifying fibre raw yarn after pre-dispersed is carried out preheating;
After d, the preheating each (can not be used some here; Can not be suitable in the claim and estimate approximately such vocabulary) strand the fortifying fibre raw yarn advance the yarn through hole from corresponding above-mentioned impregnating unit different and get into that above-mentioned impregnation chamber is disperseed and be squeezed into the molten plastic dipping in the above-mentioned impregnation chamber from extruder through above-mentioned dipping runner, extrude the material bar of long fibre reinforced thermoplastics then from above-mentioned extrusion cavities;
The material bar of e, above-mentioned long fibre reinforced thermoplastics carries out water-cooled successively under the traction of hauling machine, utilize air knife to carry out drying removes surperficial moisture content;
F, above-mentioned material bar through water-cooled and dry long fibre reinforced thermoplastics is sent into pelleter carry out pelletizing;
The material grain that g, the above-mentioned pelletizing of collection form.
8, the method for production long fibre reinforced thermoplastics according to claim 7 is characterized in that, above-mentioned material bar through the long fibre reinforced thermoplastics behind the step e is carried out package earlier again it is carried out the pelletizing described in the step f.
The method of aforesaid production long fibre reinforced thermoplastics is characterized in that, employed above-mentioned long fibre raw yarn is a kind of or two kinds the mixing in glass fiber yarn, the carbon fiber yarn.
The method of aforesaid production long fibre reinforced thermoplastics is characterized in that, the filament diameter of above-mentioned long fibre raw yarn is 9-18 μ m, and number number is 40-1000tex.
The usefulness of technical scheme of the present invention is:
1, each a kind of new raw yarn dispersed structure that can effectively be applicable to the long fibre melt impregnation is provided, utilizes this structure to disperse, dispersion efficiency is high, and fiber attrition is little;
2, a kind of dipping die head is provided, this dipping die head has a plurality of impregnating units, and production efficiency is high, and sized can make things convenient for production-line arrangement, convenient disassembly and can assembling according to various processes;
3, a kind of production method of long fibre reinforced thermoplastics is provided, compares former production method, its dipping effect to fortifying fibre is better; Thereby production efficiency and quality have been improved; Because fiber attrition is little, be not easy broken end simultaneously, its continuous production capacity is strong.
Description of drawings
Fig. 1 is the structural representation of a preferred version of raw yarn dispersed structure of the present invention;
Fig. 2 is the perspective view of another preferred version of raw yarn dispersed structure of the present invention;
Yarn is examined the curve of core to Fig. 3 and the position of straight line concerns sketch map for formation the present invention looses;
Fig. 4 is the cross-sectional structure sketch map of a preferred version of dipping die head of the present invention;
Fig. 5 is the side sectional structure sketch map of a preferred version of impregnating unit of the present invention;
Fig. 6 is the FB(flow block) of the method for production long fibre reinforced thermoplastics of the present invention;
The implication of Reference numeral among the figure:
1, advances the yarn through hole, 2, collection yarn through hole, 3, the yarn core of loosing, 4, yarn guiding ring, 5, the dipping die head; 6, impregnating unit, 7, impregnation chamber, 8, the extruding end skull, 9, advance yarn termination lid, 10, collection yarn mouth mould; 11, extrusion cavities, 12, the yarn guiding ring assembly, 13, extrusion channel, 15, the molten plastic feeding mouth; A is the direction of travel of silvalin and material bar, and B is one section straight line, and C is one section plane curve, and D is a raw yarn.
The specific embodiment
Below in conjunction with Figure of description the bright technical scheme of this law is done detailed explanation.
Fig. 1 is the structural representation of a preferred version of raw yarn dispersed structure of the present invention; Fig. 2 is the perspective view of another preferred version of raw yarn dispersed structure of the present invention; Yarn is examined the curve of core to Fig. 3 and the position of straight line concerns sketch map for formation the present invention looses.
See figures.1.and.2; Raw yarn dispersed structure among the present invention comprises that two above axis are parallel to each other advances yarn through hole 1; Advancing yarn through hole 1 mode of being centrosymmetric on the cross section vertical with its axis direction distributes; Include axis and the collection yarn through hole 2 that advances the parallel axes of yarn through hole 1, this axis that advances yarn through hole 1 is through advancing the symmetrical centre of yarn through hole 1.Advancing between yarn through hole 1 and the collection yarn through hole 2 to be provided with the yarn core 3 of loosing, as shown in Figure 1, this diffusing yarn nuclear core 3 is the rough revolving body of profile, and the axis of rotation of this revolving body is parallel to the into axis of yarn through hole 1, and through advancing the symmetrical centre of yarn through hole 1.
As shown in Figure 3, C is one section plane curve, and B is one section straight line that is positioned at plane, C place, and C and B are except two ends are crossing, and all the other are non-intersect, at this moment plane curve C with one section straight line B as axis at the whole three dimensions inward turning formation revolving body that turns around.Plane curve C can be parabola, circular arc, elliptic arc, sine curve, cosine curve, in one or more combination.Plane curve C is a smoothed curve.Therefore the curve that forms revolving body can determine the profile of diffusing yarn nuclear core 3, to demands of different and technology, can design the profile of the yarn nuclear core 3 that looses according to actual conditions.But the yarn nuclear core 3 that looses must guarantee that profile is concavo-convex and the raw yarn D through advancing yarn through hole 1 and collection yarn through hole 2 can be contacted with the part of protrusion.
In addition; Also include the outer yarn guiding ring 4 that is arranged on the recess that looses between two bossings in yarn nuclear core 3 surfaces around whole diffusing yarn nuclear core 3; Be formed with level and smooth guide contact-making surface at this yarn guiding ring 4, go in the part of the depression that the guide contact-making surface can extend into the yarn nuclear core 3 that looses that best is to yarn nuclear core 3 protrusions that loose.The effect of yarn guiding ring 4 is to control direction that raw yarn D advances and raw yarn D is done further to disperse, and yarn guiding ring 4 can make the raw yarn D that passes through contact with the loose bossing of yarn nuclear core 3 of the next one.
As shown in Figure 1; Can find out that through the profile of these diffusing yarn nuclear core 3 revolving bodies this diffusing yarn nuclear core 3 has rough profile; Suitably be provided with the position of yarn through hole 1; Raw yarn D is contacted, at last through collection yarn through hole 2 from advancing to replace after yarn through hole 1 is introduced with the guide contact-making surface of diffusing yarn nuclear core 3 and yarn guiding ring 4.Can see because raw yarn D finally is drawn in the collection yarn through hole 2, when raw yarn D runs into the guide contact-making surface of loose yarn nuclear core 3 and yarn guiding ring 4, changing direct of travel in also under the effect at tension force the circumference along the guide contact-making surface of circumference that is in contact with it yarn nuclear core 3 outer surfaces that loose and yarn guiding ring 4 scatter; Raw yarn D collects again after repeatedly disperseing in the collection yarn through hole 2 at last, and in whole stroke, raw yarn D is disperseed by each, and the concrete number of times that disperses depends on the number of loose yarn nuclear core 3 bossing numbers and yarn guiding ring 4.Because entering yarn through hole 1 center is symmetrically distributed; The yarn that looses is simultaneously examined the axis of rotation of core 3 with the parallel axes of advancing yarn through hole 1 and through advancing the symmetrical centre of yarn through hole 1, so all can be by diffusing yarn nuclear core 3 and yarn guiding ring 4 dispersions from that raw yarn D that advances 1 introducing of yarn through hole.
As shown in Figure 2, the yarn nuclear core 3 that looses can also be designed to have the class spindle shape revolving body of two bossings; The number that advances yarn through hole 1 is 4.
Scheme shown in Figure 1 is than the scheme of Fig. 2, and the yarn nuclear core 3 projection distribution densities of loosing are higher, and dispersion frequency is high, material and the toughness of raw yarn D had high requirements, and scheme shown in Figure 2, dispersion frequency is lower, and it is comparatively mild that raw yarn D advances, not frangible.During practical implementation, can be according to concrete material and applied environment flexible configuration, and be not limited to the technical scheme of above-mentioned introduction.
Fig. 4 is the cross-sectional structure sketch map of a preferred version of dipping die head of the present invention; Fig. 5 is the side sectional structure sketch map of a preferred version of impregnating unit of the present invention, below in conjunction with Fig. 4 and Fig. 5 dipping die head of the present invention is elaborated.
As shown in Figure 4, be provided with dipping runner 14 in the dipping die head 5, this dipping runner 14 is used for extruder and each impregnating unit 6 that UNICOM can extrude molten plastic.Can be provided with a plurality of impregnating units 6 in the dipping die head 5, concrete number can be adjusted according to the production needs; In addition, impregnating unit 6 can directly be formed in the dipping die head 5, also can be used as the relevant position that independent structures is installed in dipping die head 5.
As shown in Figure 5, dipping die head 5 comprises the impregnation chamber 7 that two ends connect, and is provided with the extruding end skull 8 that has extrusion cavities 11 at an end of impregnation chamber 7, the other end be provided with have into a yarn through hole 1 and diffusing yarn nuclear core 3 advance yarn termination lid 9.In addition; Be provided with the collection yarn mouth mould that has above-mentioned Ji Shakou near extruding end skull 8 one sides in the impregnation chamber 7; The dead in line of extrusion cavities 11 and collection yarn through hole 2; Also be provided with the yarn guiding ring assembly 12 that is fixed on above-mentioned impregnation chamber 7 one ends, yarn guiding ring assembly 12 is provided with yarn guiding ring or yarn guiding ring components body forms yarn guiding ring.The yarn guiding ring employing of wherein, loose yarn nuclear core 3, advancing on yarn through hole 1, collection yarn through hole 2 and the yarn guiding ring assembly 12 reaches raw yarn dispersed structure as depicted in figs. 1 and 2 as previously mentioned.Extruding end skull 8, advance yarn termination lid 9 and yarn guiding ring assembly 12 all is to pack into from the two ends of impregnation chamber 7 and to fix; As a kind of preferred; It is fixing to be cooperatively interacted by the internal thread that their external screw threads that forms own and impregnation chamber 7 form, and perhaps adopts bolt that they are fixed on the two ends of impregnation chamber 7.As a kind of preferred version, can corresponding seal be set at impregnation chamber 7 two ends.
In addition; As a kind of preferred version; The yarn nuclear core 3 that looses is that the end other end that tapers off to a point is fixed on the spindle revolving body on the yarn termination lid 9 into as shown in Figure 5, advances yarn through hole 1 and connects yarn termination lid 9 so that raw yarn D is incorporated in the impregnation chamber 7, and collection yarn mouth mould 10 also is a revolving body; The axis of rotation of the axis of its axis of rotation and collection yarn through hole 1, the yarn nuclear core 3 that looses advances yarn through hole 1 and can be circle with the cross sectional shape that collects yarn through hole 2 on same straight line; Extrusion cavities 11 can be to be divided into multistage; Straight hole by the tapered segment of aperture gradually closing is consistent with the aperture is partly formed, and makes dwindling gradually to reach the extrusion molding purpose of whole extrusion cavities 11, and the cross sectional shape of extrusion cavities 11 can be set according to needs of production; As preferably, can be circular.In other shapes of needs, can realize through the different extruding end skulls 9 that change the outfit.
Except that above-mentioned, as shown in Figure 5, the outer wall of collection yarn mouth mould 10 and the inwall of extruding end skull 8 have formed the extrusion channel 13 of gradually closing in impregnation chamber 7, make to clamp-on impregnation chamber 7 interior molten plastics from molten plastic feeding mouth 15 and can get into extrusion cavities 11 smoothly.Through the special design of collection yarn mouth mould 10 and extruding end skull 8, guarantee that fortifying fibre evenly distributes in extruded stock bar cross section, and outside the not exposed discharging bar of fiber.
More than be that the specific embodiment of dipping die head of the present invention is introduced, but the foregoing description only is a technical scheme of understanding dipping die head of the present invention for the ease of better, and the technical scheme of dipping die head of the present invention is not limited only to technique scheme.
Below in conjunction with Fig. 6 to the method for utilizing the first-born product long fibre of above-mentioned dipping former reinforced thermoplastics of the present invention.
With reference to Fig. 6, this method comprises following step:
A, according to the number of impregnating unit in the above-mentioned dipping die head and the number of each impregnating unit yarn inlet, fortifying fibre raw yarn yarn tube is placed on respectively on the corresponding creel;
B, the raw yarn of drawing from fortifying fibre raw yarn yarn tube carry out pre-dispersed through the jockey pulley together;
C, the fortifying fibre raw yarn after pre-dispersed is carried out preheating;
Different strands fortifying fibre raw yarn after d, the preheating advances the yarn through hole from corresponding above-mentioned impregnating unit different and gets into that above-mentioned impregnation chamber is disperseed and be squeezed into the molten plastic dipping in the above-mentioned impregnation chamber, the material bar that is required long fibre reinforced thermoplastics from above-mentioned extrusion cavities extrusion molding then from extruder through above-mentioned dipping runner;
The material bar of e, above-mentioned long fibre reinforced thermoplastics carries out water-cooled successively under the traction of hauling machine, utilize air knife to carry out drying removes surperficial moisture content;
F, above-mentioned material bar through water-cooled and dry long fibre reinforced thermoplastics is sent into pelleter carry out pelletizing;
The material grain that g, the above-mentioned pelletizing of collection form.
In step a; Because the dipping die head that adopts can flood the fortifying fibre raw yarn by a plurality of impregnating units simultaneously; And each impregnating unit will be introduced the multiply raw yarn simultaneously; So should be according to the number of impregnating unit in the dipping die head of reality and the number that advances the yarn through hole of each impregnating unit, corresponding each impregnating unit places fortifying fibre raw yarn yarn tube on corresponding creel, so that in the process of producing, can uninterruptedly supply raw yarn.
In step b, c, the different creel jockey pulleys of a plurality of correspondences can be set, a bigger jockey pulley also can be set carry out pre-dispersed whole raw yarns.In order to strengthen pre-dispersed effect, can arrange the multiple tracks jockey pulley in the direction that raw yarn is advanced.Pre-dispersedly here mainly prepare for preheating and follow-up operation; Then pre-dispersed back raw yarn is carried out preheating.
In steps d; Thereby the difference through one group of multiply raw yarn of preheating is introduced corresponding impregnating unit respectively according to corresponding relation is advanced in the yarn through hole entering impregnation chamber; Raw yarn is disperseed and is melted plastics fully to flood in impregnation chamber; The multiply raw yarn is introduced to collection yarn through hole again and brings together and be one then, is covered by through extrusion cavities at last together to be extruded moulding in the molten plastic and to be the material bar.Because adopt the multiply raw yarn to get into impregnation chamber; And the multiply raw yarn is last all as the fortifying fibre in the same material bar, therefore with respect to production technology of expecting bar of the former yarn forming of sub-thread, this method can the less former yarn material of the number of employing number (number number is the tex value;); So under the identical situation of monofilament, the monofilament radical of per share raw yarn is few, disperses easily; The structure of dipping die head of the present invention makes raw yarn around diffusing yarn nuclear core simultaneously, says so and on a plurality of dimensions, is disperseed, and improves dispersion efficiency, and monofilament is fully flooded; In sum, owing to need to disperse monofilament to reduce, dispersion efficiency improves simultaneously; Production method than before; Can shorten the length dimension of impregnation chamber, so, make that the size of whole dipping die head is more suitable; Handled easily, and many impregnating units are worked simultaneously and have been improved production efficiency.In addition, change have that difference advances the yarn via count advance yarn termination lid, can control the content of the fortifying fibre in the per share material bar; Because the yarn that looses is examined the special construction of core, and monofilaments wear is minimum in diffusing yarn process, be difficult for broken end simultaneously; Even the broken end, draw yarn again, entry also very convenient.
As a kind of preferred version, raw yarn can be a kind of or two kinds the mixing in glass fiber yarn, the carbon fiber yarn.
As a kind of preferred version, can adopt filament diameter is 9-18 μ m, and number number is the fortifying fibre raw yarn of 40-1000tex.
The many material bars of producing through steps d pass through water-cooled and the drying of air knife among the step e successively under the traction of hauling machine; Here it is to be noted; Hauling speed through the adjustment hauling machine; Under the situation that more swap-in yarn termination is not covered, also can expect the content of fortifying fibre in the bar in certain scope control.
At last, in step f, g, be sent to the pelleter pelletizing through water-cooled and dry material bar, the material grain that is cut on request is recovered.
As a kind of preferred version; Can after through step e, will expect the bar rolling earlier; Then carry out pelletizing and collection, even such benefit is to break down, and also can not influence the work of pelleter, and does not need the pelletizing speed and the hauling speed of pelleter synchronous.
The foregoing description does not limit the present invention in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in protection scope of the present invention.
Claims (10)
1. be applicable to the raw yarn dispersed structure of long fibre molten plastic dipping, it is characterized in that what comprise that axis is parallel to each other plurally advances the yarn through hole, above-mentioned advance the yarn through hole with its axially vertical cross section on distribute with the center symmetric mode; Comprise that also axis is through above-mentioned that advance yarn through hole symmetrical centre and advance the parallel collection yarn through hole of yarn through-bore axis with above-mentioned; Also comprise and to examine core with the diffusing yarn that contact through the above-mentioned raw yarn that advances yarn through hole and collection yarn through hole with concavo-convex profile; Yarn nuclear core that should loose is only to intersect at 2 straight line rotation with it in the same plane and the revolving body that forms by a plane curve; Above-mentioned curve is a smoothed curve, above-mentioned straight-line pass is above-mentioned advance the yarn through hole symmetrical centre and with the above-mentioned parallel axes of advancing the yarn through hole; Also comprise the recess that is arranged between two bossings of above-mentioned diffusing yarn nuclear wicking surface yarn guiding ring peripheral and that can examine core around whole diffusing yarn, above-mentioned yarn guiding ring is formed with the level and smooth guide contact-making surface to the diffusing yarn nuclear core protrusion that is positioned at its center.
2. the raw yarn dispersed structure that is applicable to long fibre molten plastic dipping according to claim 1; It is characterized in that the curve that forms above-mentioned diffusing yarn nuclear core is one or more the combination in parabola, circular arc, elliptic arc, sine curve, cosine curve, the straight line.
3. adopt raw yarn as claimed in claim 1 to break up the dipping die head of structure; Comprise the dipping runner; It is characterized in that; Also comprise the more than one impregnating unit that communicates with above-mentioned dipping runner, above-mentioned impregnating unit comprises the impregnation chamber that two ends connect, and is provided with the extruding end skull that has extrusion cavities at an end of above-mentioned impregnation chamber; The other end be provided with have above-mentioned advance yarn through hole and diffusing yarn nuclear core advance yarn termination lid, is provided with the collection yarn mouth mould that has above-mentioned Ji Shakou near above-mentioned extruding end skull one side in the above-mentioned impregnation chamber; The axis of above-mentioned extrusion cavities and collection yarn through hole point-blank.
4. dipping die head according to claim 3 is characterized in that, is provided with the yarn guiding ring assembly that is fixed on above-mentioned impregnation chamber one end in the above-mentioned impregnation chamber, and above-mentioned yarn guiding ring assembly is provided with above-mentioned yarn guiding ring or yarn guiding ring components body forms above-mentioned yarn guiding ring.
5. dipping die head according to claim 4 is characterized in that, the outer wall of the inwall of above-mentioned extruding end skull and collection yarn mouth mould is formed with the extrusion channel of gradually closing.
6. dipping die head according to claim 5 is characterized in that, the number of above-mentioned impregnating unit is 1 to 60, and the number that advances the yarn through hole that above-mentioned each impregnating unit is provided with is 2 to 30.
7. utilize the method for the first-born product long fibre of dipping former as claimed in claim 3 reinforced thermoplastics, it is characterized in that, comprise the steps:
A, according to the number of impregnating unit in the above-mentioned dipping die head and the number of each impregnating unit yarn inlet, fortifying fibre raw yarn yarn roller is placed on respectively on the corresponding creel;
The jockey pulley that b, the raw yarn of drawing from fortifying fibre raw yarn yarn roller pass through more than one is broken up in advance;
C, the fortifying fibre raw yarn after breaing up is in advance carried out preheating;
Different strands fortifying fibre raw yarn after d, the preheating advances the yarn through hole from corresponding above-mentioned impregnating unit different and gets into that above-mentioned impregnation chamber is broken up and be squeezed into the molten plastic dipping in the above-mentioned impregnation chamber, the material bar that is required long fibre reinforced thermoplastics from above-mentioned extrusion cavities extrusion molding then from extruder through above-mentioned dipping runner;
The material bar of e, above-mentioned long fibre reinforced thermoplastics carries out water-cooled successively under the traction of hauling machine, utilize air knife to carry out drying removes surperficial moisture content;
F, above-mentioned material bar through water-cooled and dry long fibre reinforced thermoplastics is sent into pelleter carry out pelletizing;
The material grain that g, the above-mentioned pelletizing of collection form.
8. the method for production long fibre reinforced thermoplastics according to claim 7 is characterized in that, above-mentioned material bar through the long fibre reinforced thermoplastics behind the step e is curled earlier again it is carried out the pelletizing described in the step f.
9. the method for production long fibre reinforced thermoplastics according to claim 8 is characterized in that, employed above-mentioned long fibre raw yarn is a kind of or two kinds the mixing in glass fiber yarn, the carbon fiber yarn.
10. the method for production long fibre reinforced thermoplastics according to claim 9 is characterized in that, the filament diameter of above-mentioned long fibre raw yarn is 9-18 μ m, and number number is 40-1000tex.
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| CN104441323A (en) * | 2014-12-23 | 2015-03-25 | 谭洪生 | Melt feeding device, and device and method for forming continuous fiber reinforced thermoplastic impregnated belts |
| CN106346636A (en) * | 2016-08-29 | 2017-01-25 | 中山市新力工程塑料有限公司 | Vibration dipping fiberglass LFT manufacturing equipment and LFT preparing method applied to the equipment |
| CN107635737A (en) * | 2015-04-30 | 2018-01-26 | 赢创德固赛有限公司 | Method and apparatus for producing fibrous composite |
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| CN109370209A (en) * | 2018-11-19 | 2019-02-22 | 中山大学 | A kind of liquid phase preparation process and preparation facilities of ultra-thin prepreg tape |
| CN109648892A (en) * | 2019-01-17 | 2019-04-19 | 南京百优挤出机械有限公司 | LFT impregnates the immersion slot of die head and application LFT dipping die head |
| WO2020215594A1 (en) * | 2019-04-25 | 2020-10-29 | 深圳市银宝山新科技股份有限公司 | Fiber feeding device and fiber feeding system |
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| CN103381654A (en) * | 2013-06-28 | 2013-11-06 | 句容市百事特复合材料有限公司 | Particle material granulating mould capable of forcefully dispersing fibers and strengthening infiltration |
| CN104441323B (en) * | 2014-12-23 | 2017-05-10 | 谭洪生 | Melt feeding device, and device and method for forming continuous fiber reinforced thermoplastic impregnated belts |
| CN104441323A (en) * | 2014-12-23 | 2015-03-25 | 谭洪生 | Melt feeding device, and device and method for forming continuous fiber reinforced thermoplastic impregnated belts |
| CN107635737B (en) * | 2015-04-30 | 2020-07-24 | 赢创运营有限公司 | Method and device for producing a fibre composite material |
| CN107635737A (en) * | 2015-04-30 | 2018-01-26 | 赢创德固赛有限公司 | Method and apparatus for producing fibrous composite |
| US11618183B2 (en) | 2015-04-30 | 2023-04-04 | Evonik Operations Gmbh | Process and device for the production of a fiber-composite material |
| CN106346636B (en) * | 2016-08-29 | 2018-07-24 | 中山市新力工程塑料有限公司 | A kind of vibration dispersion dipping glass LFT manufacturing equipments and the LFT preparation methods using the equipment |
| CN106346636A (en) * | 2016-08-29 | 2017-01-25 | 中山市新力工程塑料有限公司 | Vibration dipping fiberglass LFT manufacturing equipment and LFT preparing method applied to the equipment |
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| CN109370209A (en) * | 2018-11-19 | 2019-02-22 | 中山大学 | A kind of liquid phase preparation process and preparation facilities of ultra-thin prepreg tape |
| CN109648892A (en) * | 2019-01-17 | 2019-04-19 | 南京百优挤出机械有限公司 | LFT impregnates the immersion slot of die head and application LFT dipping die head |
| CN109648892B (en) * | 2019-01-17 | 2024-04-26 | 南京百优挤出机械有限公司 | LFT dipping die head and dipping tank using same |
| WO2020215594A1 (en) * | 2019-04-25 | 2020-10-29 | 深圳市银宝山新科技股份有限公司 | Fiber feeding device and fiber feeding system |
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